Article 65, paragraph (4) and Article 66, paragraph (4) of the new Act on General Rules for National Taxes apply to a national tax for which the statutory tax return due date (including a due date deemed to be the statutory tax return due date under the provisions of the national tax laws, and, for a return of refund claim prescribed in Article 61, paragraph (1), item (ii) of the Act on General Rules for National Taxes, meaning the date on which the return was filed) arrives on or after January 1, 2024.